Three major trucking groups are opposed to President Donald Trump’s idea of suspending the federal fuel tax as a way to offset rising fuel costs for businesses and consumers.

In a CBS News report on Monday, the President pitched the idea of suspending the federal gasoline tax to counter rising prices at the pump, as the cost of oil soars while the war with Iran drags on.

That idea didn’t sit well with national trucking groups, the American Trucking Associations, Truckload Carriers Association and National Tank Truck Carriers, which quickly released a joint statement detailing their opposition to such a proposal.

“We understand and appreciate the desire to provide relief to Americans facing higher fuel costs. However, history shows that gas tax holidays deliver negligible benefit to consumers. Because the tax is collected at the wholesale level and not at the retail pump, most savings never reach the consumer,” the statement said. “While the average motorist pays about $1.63 per week in federal fuel taxes, a suspension would translate into only about 30 cents in weekly savings.

The groups said that without replacement funds, fuel tax revenues supporting critical investments in highway safety and infrastructure projects would evaporate, hindering the safe and efficient movement of people and goods across the country.

“Because the tax is collected at the wholesale level and not at the retail pump, most savings never reach the consumer. While the average motorist pays about $1.63 per week in federal fuel taxes, a suspension would translate into only about 30 cents in weekly savings,” the trucking associations said.

The president cannot suspend the fuel tax without Congress’s approval. However, lawmakers from both parties this week expressed some support for the idea and have pushed for a gas-tax suspension, saying it would provide much-needed relief for families and businesses that rely on their cars and trucks to get to work and school and make key deliveries to markets.